详解Oracle自定义异常示例

declare
v_count number;
begin
select count(*) into v_count from dept;
if v_count < 10 then
raise_application_error(⑵0001,’数量小于10′);
end if;
end;

declare
v_count number;
my_exp exception;
begin
select count(*) into v_count from dept;
if v_count < 10 then
raise my_exp;
end if;
exception
when my_exp then
dbms_output.put_line(‘数量小于10’);
when others then
dbms_output.put_line(‘其他异常’);
end;

CREATE OR REPLACE PROCEDURE test_Exception_byLeejin
(
ParameterA IN varchar,
ParameterB IN varchar,
ErrorCode OUT varchar –返回值,毛病编码
)
AS
/*以下是一些变量的定义*/
V NUMBER;
V nvarchar();
V NUMBER;
APP_EXP EXCEPTION; –自定义异常
BEGIN
ErrorCode :=”;
IF (ParameterA=ParameterB) THEN
ErrorCode := ‘ParameterA = ParameterB’;
RAISE APP_EXP; — 抛出异常
END IF;
EXCEPTION
WHEN APP_EXP THEN –在处理异常
RAISE_APPLICATION_ERROR(-,ErrorCode);
WHEN OTHERS THEN
RAISE_APPLICATION_ERROR(-,’未知异常’);
END;